Power source, power failure detection apparatus, and image forming apparatus
US9270163B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2013 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Jul 31, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power source includes a rectifying unit configured to full-wave rectify an AC voltage to be input, a first and second converter configured to convert the voltage rectified by the rectifying unit, a zero cross detection unit configured to detect a zero cross of the AC voltage, a voltage detection unit configured to detect the AC voltage, a first capacitance element connected across a potential after being subjected to rectification by the rectifying unit and a ground, a first discharging resistor configured to discharge electric charges charged in the first capacitance element, a first switch unit configured to cut off a current flowing to the first discharging resistor and a stopping unit configured, in a case where the AC voltage is detected by the voltage detection unit and the detected voltage is smaller than a threshold value, to stop the operation of the second converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.